1. Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
2. Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
3. Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan.
4. Clinical Bio Resource Center, Kyoto University Hospital, Kyoto, Japan.
5. Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kobe University, Hyogo, Japan.
6. Department of Gastroenterology and Hepatology, National Hospital Organization Kyoto Medical Center, Kyoto, Japan.
7. Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
8. Department of Gastroenterology and Hepatology, Osaka Red Cross Hospital, Osaka, Japan.